Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\adminlte3\vendor\bacon\bacon-qr-code\test\Encoder\MatrixUtilTest.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\bacon\bacon-qr-code\test\Encoder\MatrixUtilTest.php on line 15